Bellows



(No Model.) 2 sheets-sheen 1. S. T. GULP. BBLLOWS.

No, 444,744. l Patented Jan. 1s, 1891'.

(No Model.) 2 Sheets-Sheet 2.

S. T.. GULP. BBLLoWs.

No. 444,744. Patented .141413, 189L.

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SAMUEL THADDEUS CULI), OF DENVER, COLORADO.

f s E L i. o W s.

SECIFICATION forming part of Letters Patent No. 4 14,744, dated January 13, 1891. Application filed February 24:, 1890. Serial No. 341,600. (No model.)

To all whom, it may concern:

Be it known that I` SAMUEL THADDEUS CUL?, a citizen ot the United States, residing at Denver, in the county of Arapahoe and State of Colorado, have invented a new .and useful Improvement in Bellows, of which the following is a specification.

The object oi' my invention is to devise a bellows which may be manufactured by ordinary mechanics ol material easily procurable, and which bellows will produce a constant ii'orcible blast of air. y

Figures l and 2 illustratel the principal features of my invention. Figs. 8 and i are modifications.

My invention embraces two principal features or combinations of parts, which may be used in combination with each other or in combination with 'equivalents of each other.

The drawings are in vertical longitudinal mid-section and illustrate my invention as it may be employed in the construction of four different styles of bellows.

Figure l represents a bellows in which both the principal features of my invention are employed in combination with each other. Fig. 2 represents a bellows in which the feature or combination of parts which I consider most important is employed without the other feature herein claimed. Figs. 3 and 4 repre sent forms of bellows in which such other feature is employed without'the feature shown in Fig. 2.

The feature I consider of most value consists of the combination of a verticallyrcciprocating inverted tank having its upper end provided with a vaived inlet and having its lower end open and immersed in liquid, a discharge chamber, a valved pipe opening into the discharge-chamber from the chamber formed within the inverted tank between the head of such tank and the surface of the liquid, means for producing a constant pressure upon the air within the discharge-chamber while the bellows is being operated, and a discharge-pipe opening from the dischargechamber.

In Figs. l and 2, A, A, and A2 represent the vertically-reciprocating tanks. B is the valved inlet-opening. C is the valved egress pipe openin g into the discharge-chamber from the chamber formed within the inverted tank.

`downward and immersed in liquid.

D is the discharge-chamber. E is the discharge-pipe. rIhe means employed for producing a constant pressure within the discharge-cl1amber may be varied. The means for this purpose (shown in Fig. l) consists of the combination. with the discharge-chamber D, of an auxiliary air-chamber F, connectedl with D by a free passage-way G at the bot..- tom of the chambers, and a liquid filling in such chambers extending above such connecting passage-way. lVhen air is forced into D through C more rapidly than it escapes through E, the air in D becomes compressed and forces the liquid up into F, and the weight of the column of liquid in F, together with the expansion of the air in the top of F, tends to produce a constant pressure upon the air in D and will drive the air out at E for a short time after the blasts through O have ceased. This arrangement prevents any variation of the blast which might be caused by intervals between the blasts through C C.

In Fig. 2 the discharge-chamber is a vertically-movable tank D', having one end open The weight of the tank produces an approximately constant pressure upon the air in D when the bellows is operated. II H are weights to increase the pressure upon the air in D. The column of liquid around D rises as the press- Aure within D is increased, and its weight tends to give constancy to the stream of air passing out through the dischargepipe E.

The other feature of my invention (illustrated in Figs. l, 3 and a) consists of the com bination of a dischargechamber provided with a discharge-pipe and with means for producing a pressure upon the air within such chamber when the bellows is operated, two extensible bellows-boxes having valved inlets and being connected with the discharge-chamber by valved outlet-pipes, a walking-beam, a cord attached by its ends to the ends. of the walking-beam and in its intermediate length attached to the heads of the bellows-boxes and passing over pulleys, and said pulleys respectively arranged opposite to and in line with the attachments of the cords with the walking-beam and the heads of the bellowsboxes, whereby when the walking-beam is operated the heads of the bellows-boxes will be positively and forcibly reciprocated.

IOO

`the tank raises, it receives air. at B.

In Fig. l the extensible bellows-boxes are formed of the inverted tanks A A', having their lower ends immersed in liquid. In the drawings, I is the walking-beam. J is the cord. K K are the pulleys. L represents the water-box partially filled with liquid, in which the inverted tanks are immersed. The pipes C extend upward through the bottom of the water-box directly beneath the center of the bellows-boxes A A and extend above the level of the liquid, so that the cord can pass therethrough, without causing leakage. In cold climates it is well to use some liquid, such as oil, which does not easilycongeal; but in warmer climates water is preferable.

In operating the form of bellows shown in Fig. l the walking-beam is moved up and down, and the tanks, A A are thereby alternately raised and lowered in the water.. As

lowered, it discharges air through C into D. The liquid in which the lower end of A A is immersed forms aL perfect packing to prevent the escape of air from A A. Vhen A descends,.the air is colnpressedanddrives a portion ofthe water in A down, thus raising the levelofthe liquidsurrounding A. IVhen the upstroke begins, the liquid surrounding AV falls andcauses-the liquid within A to rise, thus forcing air out through C during the iirst part of the upward stroke of A. Thisl tends to produce av constant pressure in D, for the reason thatthe blast from one tank continues through all the time the other tank is iilling and until it` has begun to discharge.

In this Way I avoidthe interval between blasts at the moment thewalking-beam stops tobegin its return-stroke. Where only one bellows-box, as A2, is used, the dischargechamber should bel movable and Weighted,as D Hin Fig. 2. Then D serves the office of the bellows-box A in Fig. l and descends while A2`is ascending.

In Fig. 3 the bellows-boxes A3 A4 are provided with leather or other iiexible walls M, attached to the base N. rlChe dischargechamber D2 is similar in construction to that of D. (Shown in Fig. l.)

As-it isl In Fig. 4 the discharge-chamber D3 is provided with flexible walls M', and the head O is weighted to compress the air in the chamber D3 when the bellows is operating. P represents the weights.

Similar letters refer to similar parts.

The forms shown in Figs. l and 2 can be constructed of wood cr of sheet metal by ordinary mechanics at a slight cost, the joints, excepting that made by the liquid packing, being straight and not'diftcult to make tight.

Now having described my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. In a bellows, the combination set forth of a discharge-chamber provided. with a discharge-pipe and with means for producing a Ipressure upon theair within suchchamber,

two extensible bellows-boxesl having` valved inlets and being connected with the discharge-chamber by valved outlet-pipes, the iwalking-beam I, and a cord attached by its ends to the ends of the walking-beamandin its @intermediate lengthattachedv tothe headsY of the bellows-boxes and passing. over pulleys, saidpulleys respectively arranged opposite 'to and in line with the attachments of the the cord J, attached'by its ends to the walk-` ing-beam and in its intermediate length attached to the heads of the tanks A A and passing over said pulleys, the valved outlet- `pipe C, discharge-chamber D` and auxiliary chamber F, connected at the bottom byI passage G and partially lled with liquid, and the discharge-.outlet E.

SAMUEL THADDEUS CULI?.

Vitnesses:

J AMES R. TowNsEND, M. T. BRoUssEAU. 

